/*
 * Copyright (c) 2005, 2017, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
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 *
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 *
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 *
 *
 *
 */

package javax.xml.datatype;

import java.security.*;
import java.net.*;
import java.io.*;
import java.util.*;

/**
 * This class is duplicated for each JAXP subpackage so keep it in sync.
 * It is package private and therefore is not exposed as part of the JAXP
 * API.
 * <p>
 * Security related methods that only work on J2SE 1.2 and newer.
 */
class SecuritySupport {


    ClassLoader getContextClassLoader() {
        return (ClassLoader)
                AccessController.doPrivileged(new PrivilegedAction() {
                    public Object run() {
                        ClassLoader cl = null;
                        try {
                            cl = Thread.currentThread().getContextClassLoader();
                        } catch (SecurityException ex) {
                        }
                        return cl;
                    }
                });
    }

    String getSystemProperty(final String propName) {
        return (String)
                AccessController.doPrivileged(new PrivilegedAction() {
                    public Object run() {
                        return System.getProperty(propName);
                    }
                });
    }

    FileInputStream getFileInputStream(final File file)
            throws FileNotFoundException {
        try {
            return (FileInputStream)
                    AccessController.doPrivileged(new PrivilegedExceptionAction() {
                        public Object run() throws FileNotFoundException {
                            return new FileInputStream(file);
                        }
                    });
        } catch (PrivilegedActionException e) {
            throw (FileNotFoundException) e.getException();
        }
    }

    InputStream getResourceAsStream(final ClassLoader cl,
                                    final String name) {
        return (InputStream)
                AccessController.doPrivileged(new PrivilegedAction() {
                    public Object run() {
                        InputStream ris;
                        if (cl == null) {
                            ris = Object.class.getResourceAsStream(name);
                        } else {
                            ris = cl.getResourceAsStream(name);
                        }
                        return ris;
                    }
                });
    }

    boolean doesFileExist(final File f) {
        return ((Boolean)
                AccessController.doPrivileged(new PrivilegedAction() {
                    public Object run() {
                        return f.exists();
                    }
                })).booleanValue();
    }

}
